Twin grafting-tool.



J. SPEICH.

TWIN GRAFTING TOOL.-

APPucATIoN HLED s'EPul 1, 1917.

1,282,132. Patentd Oct. 22, 1918.

IN VEN TOR.

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J OHN SPEICH, OF SACRAMENTO, CALIFORNIA.

TWIN GRAFTING-TOOL.

i Specfication of Letters Patent.

Patenteol Oct. 22, 1918.

Application filed September 17, 1917. Serial No. 191,870.

To aZZ whom it may concern:

Be it known that I, JoHN SPEICH, a citizen of the United States, residing at Sacramento, in the county of Sacramento, State of California, have invented certain new and useful Improvements in Twin Grafting- Tools; and I do declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvenients in tools used for grafting. The object of the invention is to provide a tool which will perform the complete Operation of forming thev hole for receiving the graft. To this end I aim to have one portion of the tool to be driven into the tree to form a V shaped incision and then the other portion of the tool is driven in to cut out the third side, making a clean three sided cut in the tree with the use of the single tool.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such Structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a side elevation of the complete tool partly broken out and in section.

Fig. 2 is a sectional view of the tool taken on a line :o m of Fig. 1.

Fig. 3 is a top line view of the cutters.

Referring now more particularly to the characters of reference on the drawings, T first provide a V shaped cutter 1, having a rearwardly projecting shank 2 terminating in a head 3. Pivoted on the shank 2 is a guide 4 provided with a strap 5 extending around the shank 2 and tirough which is threaded a thumb screw 6. This thumb screw 6 engages the shank 2 for the purpose of adjusting the relative position of the guide 11 on such shank. The guide 4 is provided with a pair of slotted members ta and 111). Slidable through these slotted members is the shank 7 of the other cutter blade 8. This cutter blade is flat and pointed and moves between the top edges of the V shaped cutter blade 1 which also terminates in a sharp point. The shape of the blade 8 is such that when it is moved between the sides of the blade 1 it completely fills the space'between such Sides, so that the outer edges of the blade 8 come into engagement with the edges of the blade 1.

The blade 8 is normally held retracted from engagementwith the blade 1 by means of a Spring 9 mounted around the shank 7 and interposed between the member at and a pin 10 on said shank 7 whereby the pressure of said Spring 9l1olds the shank in that position which will maintain the blade 8 from engagement with the blade 1. lNhen it is desired to use the tool, the blade or cutter 1 is driven into the tree with a hammer, or other instrument, used against the head 3.' The shank 7 is then likewise driven to force the blade 8 into the tree, and when this is done a three cornered piece is removed from the tree, leaving a similar shaped hole therein into which the grafting splice may be inserted.

The adjusting thumb screw 6 is used to position the edges of the blade 8 with respect to the blade l so that they will come together when the cut is being made so as to make a good clean three-cornered hole for the graft. If this adjustment is not provided, then if the blades become slightly worn or sprung, the piece cut from the tree might have a thin adhering portion which might have to be torn away. This would leave a ragged edge which is undesirable. By having such adjustment screw 6, however, the two blades may be kept adjusted so as to make a clean cut at all times.

The proper position of the pivoted guide 4 is maintained by means of a strong spring 11 interposed between the shank 2 and such guide 4. This Spring 11 also maintains the blade 8 in its proper position relative to the blade 1. When, however, the cut has been made and the piece of wood is between the blades, the member 7 is pressed toward the member 2 against the pressure of this Spring 11. This lifts the blade 8 clear of the blade 1 and permits the piece or core of wood to be readily removed.

From the foregong description it will be readily seen that I have produced such a device as substantially fulfils the object of the invention as set forth heroin;

While this specification sets fort-h in detail the present and preferred construction of the device, still in practice such devations from such detail may be resorted togastdo not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and Useful and desire to secure by Letters Patent is:

1. A grafting tool comprising' two cop eratve hlades, each having a driving` shank, a guide pivoted on one Shanl, the otheiI shank being sldable vin thehguide, and means for a'djnsting the position of the guide on the shank, such means comprising' a strap on the lguide snrroundingl the Shank and a thumh screw threaded through the strapand eng-aging the shank.

A donhle-edged grafting tool including a fixed hladeand e lolade inova'ole `in the plane in which the edges of'the tixed'blade lie to cuta gra-fting core which will be inclosed bbetween the Vhlades, the .blades being pivotally mounted for relative lateralmorement whereby they may be Spread apart to allow the removal of the core.

8. A grafting tool comprieing` two cooperative blades, each having a driving shank, a guide for one shank pivoted .on the other shanl, whereby the two lolades may be and a Spring interposed between the shanks to hold the-hlades in normal cutting positiem.

4. A grafting tool comprising` two cooperative blades, each having` a driving shank, a guide for one Shanl: pivoted onthe other shank, and means for adjusting the position of the guide relative to the shanl: on which it is pivoted to Iallow the relative position of the cnttingedges of the hlades to be adjusted at will.

5. A grafting tool including` a V-shaped blade,-the edges thereof tapering to a point at their otiter end, a hlade movahle in the plane in -whichthe cutting edgee of the Shaped blade lie and adapted to form the third-side of the VV-shaped blade when the core is out whereloy the cut core will be inclosedlbetween the hlades, the blades being pivotally mounted for relative lateral. movement wherehy they may be Spread apart to ollow the removal of the core.

n testimony whereof affix my Signature in the presence of two witnesses.

JOHN SPE'ICH. VVitnesses Ross E. PIEROE, v.SYEN H. HANSEN,

Copies of this patent may be obtaineflforfiw cents each, by adressing' the Gominssoner of atents. Washington, D. 0. 

